Submission #543281

# Submission time Handle Problem Language Result Execution time Memory
543281 2022-03-30T03:31:13 Z 8e7 Monochrome Points (JOI20_monochrome) C++17
35 / 100
2000 ms 7392 KB
//Challenge: Accepted
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 400005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
int a[maxn], p[maxn];
int bp[maxn], wp[maxn];
struct BIT{
	int bit[maxn];
	void init(int n) {
		for (int i = 0;i <= n + 1;i++) bit[i] = 0;
	}
	void modify(int ind, int val) {
		ind++;
		for (;ind < maxn;ind += ind & (-ind)) bit[ind] += val;	
	}
	int query(int ind) {
		ind++;
		int ret = 0;
		for (;ind > 0;ind -= ind & (-ind)) ret += bit[ind];
		return ret;
	}
} bit;
int main() {
	io
	int n;
	cin >> n;
	n *= 2;
	string s;
	cin >> s;
	int mi = 0, mpos = 0, cur = 0;
	for (int i = 0;i < n;i++) {
		if (cur < mi) {
			mi = cur;
			mpos = i;
		} 
		cur += (s[i] == 'B' ? 1 : -1);
	}
	int bi = 0, wi = 0;
	for (int i = 0;i < n;i++) {
		a[i] = (s[(mpos + i) % n] == 'B' ? 1 : -1);
		if (a[i] == 1) bp[bi++] = i;
		else wp[wi++] = i;
	}	
	auto getval = [&](int x) {
		for (int i = 0;i < n/2;i++) {
			p[bp[i]] = (i < x ? 1 : -1);
			p[wp[i]] = (i < n/2 - x ? 1 : -1);
		}
		int cur = 0;
		bit.init(n);
		ll ret = 0;
		int bi = 0, wi = 0;	
		//debug(x);
		//pary(p, p + n);
		for (int i = 0;i < n;i++) {
			cur += p[i];
			if (cur < 0) return 0LL;	
			if (p[i] == 1) {
				bit.modify(i, 1);
			} else {
				int cor = (a[i] > 0 ? wp[wi++] : bp[bi++]);
				//debug(i, cor);
				ret += bit.query(i) - bit.query(cor);	
				bit.modify(cor, -1);
			}
		}
		//debug(ret);
		return ret;
	};
	ll ans = 0;
	for (int i = 0;i <= n / 2;i++) {
		ans = max(ans, getval(i));	
	}
	cout << ans << endl;
}
# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 8 ms 332 KB Output is correct
15 Correct 7 ms 400 KB Output is correct
16 Correct 7 ms 396 KB Output is correct
17 Correct 9 ms 340 KB Output is correct
18 Correct 6 ms 340 KB Output is correct
19 Correct 6 ms 340 KB Output is correct
20 Correct 6 ms 340 KB Output is correct
21 Correct 5 ms 340 KB Output is correct
22 Correct 6 ms 400 KB Output is correct
23 Correct 4 ms 340 KB Output is correct
24 Correct 4 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 4 ms 340 KB Output is correct
27 Correct 5 ms 340 KB Output is correct
28 Correct 5 ms 328 KB Output is correct
29 Correct 4 ms 340 KB Output is correct
30 Correct 4 ms 340 KB Output is correct
31 Correct 6 ms 340 KB Output is correct
32 Correct 5 ms 340 KB Output is correct
33 Correct 8 ms 324 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 8 ms 332 KB Output is correct
15 Correct 7 ms 400 KB Output is correct
16 Correct 7 ms 396 KB Output is correct
17 Correct 9 ms 340 KB Output is correct
18 Correct 6 ms 340 KB Output is correct
19 Correct 6 ms 340 KB Output is correct
20 Correct 6 ms 340 KB Output is correct
21 Correct 5 ms 340 KB Output is correct
22 Correct 6 ms 400 KB Output is correct
23 Correct 4 ms 340 KB Output is correct
24 Correct 4 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 4 ms 340 KB Output is correct
27 Correct 5 ms 340 KB Output is correct
28 Correct 5 ms 328 KB Output is correct
29 Correct 4 ms 340 KB Output is correct
30 Correct 4 ms 340 KB Output is correct
31 Correct 6 ms 340 KB Output is correct
32 Correct 5 ms 340 KB Output is correct
33 Correct 8 ms 324 KB Output is correct
34 Correct 304 ms 432 KB Output is correct
35 Correct 310 ms 444 KB Output is correct
36 Correct 288 ms 340 KB Output is correct
37 Correct 277 ms 424 KB Output is correct
38 Correct 197 ms 428 KB Output is correct
39 Correct 234 ms 440 KB Output is correct
40 Correct 237 ms 428 KB Output is correct
41 Correct 200 ms 340 KB Output is correct
42 Correct 289 ms 440 KB Output is correct
43 Correct 285 ms 340 KB Output is correct
44 Correct 236 ms 428 KB Output is correct
45 Correct 180 ms 340 KB Output is correct
46 Correct 191 ms 428 KB Output is correct
47 Correct 191 ms 460 KB Output is correct
48 Correct 240 ms 436 KB Output is correct
49 Correct 209 ms 340 KB Output is correct
50 Correct 186 ms 432 KB Output is correct
51 Correct 195 ms 432 KB Output is correct
52 Correct 277 ms 452 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 8 ms 332 KB Output is correct
15 Correct 7 ms 400 KB Output is correct
16 Correct 7 ms 396 KB Output is correct
17 Correct 9 ms 340 KB Output is correct
18 Correct 6 ms 340 KB Output is correct
19 Correct 6 ms 340 KB Output is correct
20 Correct 6 ms 340 KB Output is correct
21 Correct 5 ms 340 KB Output is correct
22 Correct 6 ms 400 KB Output is correct
23 Correct 4 ms 340 KB Output is correct
24 Correct 4 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 4 ms 340 KB Output is correct
27 Correct 5 ms 340 KB Output is correct
28 Correct 5 ms 328 KB Output is correct
29 Correct 4 ms 340 KB Output is correct
30 Correct 4 ms 340 KB Output is correct
31 Correct 6 ms 340 KB Output is correct
32 Correct 5 ms 340 KB Output is correct
33 Correct 8 ms 324 KB Output is correct
34 Correct 304 ms 432 KB Output is correct
35 Correct 310 ms 444 KB Output is correct
36 Correct 288 ms 340 KB Output is correct
37 Correct 277 ms 424 KB Output is correct
38 Correct 197 ms 428 KB Output is correct
39 Correct 234 ms 440 KB Output is correct
40 Correct 237 ms 428 KB Output is correct
41 Correct 200 ms 340 KB Output is correct
42 Correct 289 ms 440 KB Output is correct
43 Correct 285 ms 340 KB Output is correct
44 Correct 236 ms 428 KB Output is correct
45 Correct 180 ms 340 KB Output is correct
46 Correct 191 ms 428 KB Output is correct
47 Correct 191 ms 460 KB Output is correct
48 Correct 240 ms 436 KB Output is correct
49 Correct 209 ms 340 KB Output is correct
50 Correct 186 ms 432 KB Output is correct
51 Correct 195 ms 432 KB Output is correct
52 Correct 277 ms 452 KB Output is correct
53 Execution timed out 2089 ms 7392 KB Time limit exceeded
54 Halted 0 ms 0 KB -